package com.example.ywang.diseaseidentification.utils.network;
import android.util.Log;

import com.example.ywang.diseaseidentification.bean.baseData.DynamicBean;
import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.ArrayList;
import java.util.UUID;

/**
 *
 * 实现文件上传的工具类
 */

public class UploadUtils {
    private static final String TAG = "uploadFile";
    private static final int TIME_OUT = 10*10000000;   //超时时间
    private static final String CHARSET = "utf-8"; //设置编码
    public static final String SUCCESS="1";
    public static final String FAILURE="0";
    public static  String r = "";

    /**
     * android上传文件到服务器
     * @param file  需要上传的文件
     * @param RequestURL  请求的rul
     * @return  返回响应的内容
     */
    public static String uploadFile(File file, String RequestURL,DynamicBean bean) {

        String  BOUNDARY =  UUID.randomUUID().toString();  //边界标识   随机生成
        String PREFIX = "--" , LINE_END = "\r\n";
        String CONTENT_TYPE = "multipart/form-data";   //内容类型

        try {
            URL url = new URL(RequestURL);
            HttpURLConnection conn = (HttpURLConnection) url.openConnection();
            conn.setReadTimeout(TIME_OUT);
            conn.setConnectTimeout(TIME_OUT);
            conn.setDoInput(true);  //允许输入流
            conn.setDoOutput(true); //允许输出流
            conn.setUseCaches(false);  //不允许使用缓存
            conn.setRequestMethod("POST");  //请求方式
            conn.setRequestProperty("Charset", CHARSET);  //设置编码
            conn.setRequestProperty("connection", "keep-alive");
            conn.setRequestProperty("Content-Type", CONTENT_TYPE + ";boundary=" + BOUNDARY);
            if(file != null) {

                /*
                 * 当文件不为空，把文件包装并且上传
                 */
                OutputStream outputSteam=conn.getOutputStream();

                DataOutputStream dos = new DataOutputStream(outputSteam);
                StringBuffer sb = new StringBuffer();
                sb.append(PREFIX);
                sb.append(BOUNDARY);
                sb.append(LINE_END);

                /*
                 * 这里重点注意：
                 * name里面的值为服务器端需要key   只有这个key 才可以得到对应的文件
                 * filename是文件的名字，包含后缀名的   比如:abc.png
                 */

                sb.append("Content-Disposition: form-data; name=\"img\"; filename=\""+file.getName()+"\""+LINE_END);
                sb.append("Content-Type: application/octet-stream; charset="+CHARSET+LINE_END);
                sb.append(LINE_END);
                dos.write(sb.toString().getBytes());

                InputStream is = new FileInputStream(file);
                byte[] bytes = new byte[1024];
                int len = 0;
                while((len = is.read(bytes)) != -1) {
                    dos.write(bytes, 0, len);
                }
                is.close();
                dos.write(LINE_END.getBytes());
                byte[] end_data = (PREFIX+BOUNDARY+PREFIX+LINE_END).getBytes();
                dos.write(end_data);
                dos.flush();
                /**
                 * 获取响应码  200=成功
                 * 当响应成功，获取响应的流
                 */

                int res = conn.getResponseCode();
                if(res == 200) {
                    InputStream in = conn.getInputStream();
                    BufferedReader reader = null;
                    reader = new BufferedReader(new InputStreamReader(in));
                    StringBuilder response = new StringBuilder();
                    String line;
                    while ((line = reader.readLine()) != null){
                        response.append(line);
                    }
                    //将 StringBuilder转为String
                    r = response.toString();
                    DynamicBean.mUrl.add(r);
                    Log.e("list_size",String.valueOf(DynamicBean.mUrl.size()));
                    if(DynamicBean.mUrl.size() >= bean.getImg_num()){
                        bean.setUrl(DynamicBean.mUrl);
                        UpToServlet uts = new UpToServlet(bean);
                        uts.sendRequestWithHttpURLConnection();
                        bean.setUrl(null);
                        DynamicBean.mUrl = new ArrayList<>();
                    }
                    return SUCCESS;
                }
            }
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return FAILURE;
    }
}